Sleepcraft vs ZZZ Tracker

Sleepcraft reads your sleep data from Apple Health and breaks it down differently than most apps. It shows your sleep on a 12-hour clock face so you can see exactly when you got deep sleep, REM, light sleep, and awake periods. Instead of one combined sleep score, Sleepcraft gives each phase its own score — deep, REM, light, continuity, and regularity — so you know exactly what's working and what isn't. Scoring is calibrated to your age and sex. A 50-year-old man and a 25-year-old woman have different optimal deep sleep and WASO targets, based on clinical benchmarks from the NIH, CDC, and NHS. You can tag daily factors like late coffee, alcohol, or a hard workout and see how they affect not just your overall sleep, but each individual stage. Some patterns aren't obvious — for some people, ovulation can increase deep sleep, or a daytime nap might actually extend total sleep duration rather than shorten it. Sleepcraft surfaces these personal links so you're not guessing. It also connects your daytime active energy and HRV to nightly recovery, and uses your historical data to forecast tonight's sleep quality based on your current trends. All processing happens on your iPhone. No backend servers, no accounts. Your tagged factors and ratings sync through your own iCloud. Terms of Use (EULA): https://sleepcraft.app/privacy

ZZZ Tracker is your personal sleep journal — simple to log, powerful to analyze. Whether you're trying to improve sleep quality, build healthier habits, or understand what affects your rest, ZZZ Tracker helps you track every night and uncover meaningful patterns over time. LOG YOUR SLEEP IN SECONDS Record bedtime, wake time, and sleep quality in seconds. Add optional notes and tag factors such as caffeine, alcohol, exercise, stress, late meals, screen time, or naps to understand how daily habits affect your sleep. POWERFUL SLEEP INSIGHTS Sleep Goal Set a nightly sleep target and see how each night compares. Weekly Chart View your sleep duration over the last 7 days at a glance. Sleep Debt Track your cumulative sleep surplus or deficit across 7-day and 30-day periods. Factor Correlations Discover which habits are linked to better or worse sleep quality. Monthly Heatmap See every night displayed on a color-coded calendar for quick trend analysis. BUILD LASTING HABITS Set a personal sleep goal and monitor your progress over time. Maintain logging streaks to stay consistent night after night. Review bedtime consistency to understand how regular your schedule is. Enable daily reminders so you never forget to log your sleep. Receive a weekly recap every Sunday morning to review your progress. YOUR DATA, YOUR WAY Export all sleep records as CSV or JSON at any time. Back up and restore your data using Google Drive. Reset all data from Settings whenever you want a fresh start. Start tonight. Better sleep begins with awareness. Download ZZZ Tracker and take the first step toward healthier sleep.